Geobge w



G. W. DAWSON. Filter. N0.-234,660. Patented Nov. 23,1880.

|TH 5 F;W Zak PETERS. FHOTO-LITHOGRAF'HER, WASHINGTON D c Uwrrnn grates Farnnr @FHQE.

GEORGE \V. DAWSON, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO EWALD OVER, OF SAME PLACE.

FILTER.

SPECIFICATION forming part of Letters Patent No. 234,660, dated November 23, 1880.

Application filed February 10, 1880.

To all whom it may concern Be it known that I, GEORGE W. DAWSON, of Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Filter, of which the following is a specification.

My present invention relates to certain improvements in a filtering device for which I now have an application for Letters Patent pending in the Patent Office, in which application a receptacle containing sileXor other filtering material operates in conjunction with a five-way cock.

The objects of my present invention are, first, to provide a filtering-receptacle with a cock-case having four ports, and a key having a central partition with a large recess or waterway on each side, adapted to reverse the currents of water in the filteringreceptacle without shutting off the inlet or discharge openings and without having any sediment-discharge pipe attached to the key; second, to afford facilities for inserting or removing the filtering material in the filtering-receptacle; third, to provide a means for reversing the position of the key and changing the direction in which the water passes through the filtering-receptacle, which can be operated at any desired distance above the filter. I attain 0 these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 represents a plan or top view of the entire machine. Fig. 2 is also a top view, showing a horizontal section of the key and cock-case, also a portion of the filtering-receptacle. Fig. 3 is a vertical section of the key, the cock-case, and part of the filtering-receptaole, taken at the line a: w of Fig. 2, but showing the key with its partition in position to close the inlet and outlet ports of the cockcase; and Fig. 4. is a top view of the cock-case and key.

Similar letters refer to similar parts throughout the various views.

In giving a detail description of my present invention it will necessitate a repetition of a considerable portion of the specification of my former application referred to. I therefore do not claim, broadly, any device or combination of devices shown, described, or claimed in said former application that may be incorporated in this application.

The hollow receptacle A may be constructed of any desired form and of any suitable material, and is filled with silex, animal-charcoal, orother suitable filtering material, and also provided with a man-hole and man-head, O, for the purpose of inserting or removing the filtering material; or a series of screw-plugs,

a, may be inserted in the shell of the recep- 6o tacle for the same purpose.

The four-way cock is composed of the outer case or shell, B, having flanges E at each side to fit between the flanges E of the filtering-receptacle and form a tight joint, with screens G G between the flanges. The case B is provided with a socket, 0,011 the outside to receive the waterinlet pipe D, and is also provided with a socket, O, on the inner side to receive the discharge or distributing pipe H K. The ports P P lead into opposite ends of the filtering-receptacle. The port P forms an inlet for the water and the port I? a discharge for the water and sediment collected in the filtering material.

The key F is tapered to fit into its socket, and is held in place by the washer b and nut d. The central partition, F, of the key separates the water recesses or passages r r from each other, as shown in Figs. 2 and 3. These recesses r and 1 are closed at the bottom and top to prevent the passage of water either up or down, and the upper end of the key is provided with a rod, g, of any desired length, on the upper end of which is secured a crank or hand Wheel, D, for operating the key.

The upper edge of the key-socket in the case Bis provided with two stops, it a, and the key F is provided with a pin, m, which operates between the stops a n and regulates the distance that the key turns,as shown in Fig. 4.

The discharge or distributing pipe H K is provided with a cock, M, at any suitable place between the filterer and discharge-openings in the distributing-pipe. This cockMis used 5 to remove the sediment collected in the filtering material.

The operation of my improvement is as follows: When the key F is turned by the crank or wheel D so that the partition F is in the position shown in Fig. 2, then the pin m of the key is against the stop a of the case B, and the water from the inlet-pipe D passes through the port P into the recess r and into the filtering-receptacle A through the. port P. The water passes through the screen G into the filtering material It, and the sediment is collected in the filtering material near the screen Gr, while the water passes through the receptacle A and screen G into the port P and through the recess 1" and port P into the discharge or distributing pipe H K for use. The water is allowed to run in this direction until it becomes necessary to remove the sediment collected in the filtering material near the screen G. Then the key F is turned until the pin m is in contact with the stop a, which causes the partition F to assume the position shown in dotted lines, thus reversing the direction in which the water flows through the filtering-receptacle. At the same time the cock M is opened, and as the sediment is removed from the filtering material near the screen G by the reverse action of the water it is discharged through said cock M until the water runs clean, after which the cock M is closed and the water allowed to flow in this last-mentioned direction until the sediment which collects in the filtering material near the screen G has to be removed, when the same operation is repeated by turning thekey again into the position shown in Fig. 2.

It will be observed that the ports 1 P of the cock-case are never closed by the turning of the key, and the water flows through them always in one direction; but the direction in which the water enters the filtering-receptacle through the ports I? P is reversed as the key is turned.

It is also obvious that the cock M may be a three-way cock for the purpose of shutting off discharge-openings while the sediment is being discharged.

I am aware that prior to my present invention water-filterers have been made in which the sediment has been removed by reversing the direction in which the water passes through the filterer; also, that the filterer shown in my prior application referred to is somewhat similar in outward appearance to my present invention. I therefore do not claim such devices, broadly; but

What I do claim as my invention, and de sire to secure by Letters Patent, is-

In a water-filterer, the cock-case B, provided with ports P P P P, a supplypipe connection, 0, a discharge-pipe connection, 0, connections E for a filtering device, and stops on n for the key, combined with the key 1*, provided with a central partition, F, having recesses M on each side, both recesses closed at the top and bottom, the stop-pin m, the rod g, and crank orband wheel D, all adapted to be operated substtmtially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEU. W. DAWSON.

Witnesses E. O. FRINK, Gno. H. BENNETT. 

